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Affordable Care Act

The ACA MarketplaceS

Tracking Insurer Changes in the ACA Marketplaces in 2027

As of June 22, six carriers have announced that they will exit the Marketplaces in plan year 2027, either in some or all states that they are currently offering plans; four carriers have announced they will enter new Marketplaces.

An image of text is an excerpt from Cynthia Cox's quick take which reads, "While the Trump administration attributes this drop in enrollment to their attempts to address fraud, this coverage loss happened at the same time millions of people faced steep increases in their premium payments — often in the double or even triple digits — with the expiration of enhanced tax credits."

ACA Marketplace Enrollment Is Down By 3 Million After Big Jump in Premium Payments

Enrollment dropped 13% following the expiration of enhanced premium tax credits at the beginning of this year. Enrollment fell from a high of 22.1 million people in 2025 to 19.2 million people in February 2026. While the Trump administration attributes this drop in enrollment to their attempts to address fraud, this coverage loss happened at the same time millions of people faced steep increases in their premium payments – often in the double or even triple digits – with the expiration of enhanced tax credits.

POLLING on the ACA

Tracking the Public’s Views on the ACA

While overall opinion of the Affordable Care Act has been more favorable than unfavorable since 2017, there remain deep partisan divides. See how public opinion on the ACA has changed from the inception of the law to the present. This interactive tool highlights key moments when views shifted and trends based on party identification, income, age, gender, and race/ethnicity.

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  • Poll: Majorities Favor a Range of Options to Expand Public Coverage, Including Medicare-for-All

    News Release

    At a time when debate is beginning about a national Medicare-for-all plan and other approaches to expanding coverage through public programs, this month’s KFF Health Tracking poll examines Americans’ early opinion on a range of options under consideration. The poll finds majority support for four different approaches: 77 percent of the public, including most Republican (69%), favor allowing people between the ages of 50 to 64 to buy health insurance through Medicare; 75 percent, including…

  • Testimony: Pre-Existing Conditions and Health Insurance

    Issue Brief

    KFF's Karen Pollitz testimony before the U.S. House Committee on Ways and Means on Jan. 29, 2019 examines the prevalence of pre-existing conditions, the impact of the Affordable Care Act's prohibition against medical underwriting and other provisions aimed at stabilizing the insurance risk pool, and the trade-offs involved in relaxing those provisions. 

  • An Overview of State Approaches to Adopting the Medicaid Expansion

    Issue Brief

    State approaches to adopting the Affordable Care Act’s Medicaid expansion have varied greatly by state based on state law, the political context, or other factors. While it does not cover how every state has enacted the Medicaid expansion, this issue brief highlights some of the different approaches states have taken to adopt the Medicaid expansion. Each state’s circumstances are unique, and the actions taken by one state may not apply to another state’s circumstances.

  • Analysis: Marketplace Plans Denied an Average of Nearly One in Five Claims in 2017 with Wide Variations across Insurers

    News Release

    Healthcare.gov marketplace insurers denied nearly one out of every five claims (19%) submitted for in-network services in 2017, and enrollees only appeal a tiny share (0.5%) of those denied claims, a KFF analysis of recently released claims data finds. The analysis finds a huge variation across insurers, with average denial rates as low as 1 percent and as high as 45 percent. Denial rates also vary across states, though individual insurers in the same state…

  • From Ballot Initiative to Waivers: What is the Status of Medicaid Expansion in Utah?

    Issue Brief

    The Utah legislature significantly changed and limited the Medicaid coverage expansion that was adopted by the voters through a ballot initiative in November 2018. This issue brief explains new provisions in Utah's recently amended Section 1115 Medicaid waiver and the additional amendments that the state has submitted to CMS, including most recently a request for enhanced ACA federal matching funds for an expansion to 138% FPL with an enrollment cap.

  • Poll Finds Most Americans Oppose the Trump Administration’s Changes to Restrict Title X Family Planning Funds from Clinics that also Provide or Refer for Abortion

    News Release

    A new KFF poll of the public’s views on reproductive health issues finds most Americans, including majorities of women of reproductive age, are concerned that access to women’s reproductive health and preventive care services may be limited by the Trump administration’s changes to Title X, the nation’s federal family planning program. The poll examines the public’s views of major regulatory changes to the Title X program, which funds nearly 4,000 clinics nationally to pay for…